59b6f87344
cgroup_event is now memcg specific. Replace cgroup_event->css with ->memcg and convert [un]register_event() callbacks to take mem_cgroup pointer instead of cgroup_subsys_state one. This simplifies the code slightly and makes css_to_vmpressure() unnecessary which is removed. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.cz>
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
#ifndef __LINUX_VMPRESSURE_H
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#define __LINUX_VMPRESSURE_H
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/workqueue.h>
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#include <linux/gfp.h>
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#include <linux/types.h>
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#include <linux/cgroup.h>
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#include <linux/eventfd.h>
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struct vmpressure {
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unsigned long scanned;
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unsigned long reclaimed;
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/* The lock is used to keep the scanned/reclaimed above in sync. */
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struct spinlock sr_lock;
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/* The list of vmpressure_event structs. */
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struct list_head events;
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/* Have to grab the lock on events traversal or modifications. */
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struct mutex events_lock;
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struct work_struct work;
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};
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struct mem_cgroup;
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#ifdef CONFIG_MEMCG
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extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
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unsigned long scanned, unsigned long reclaimed);
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extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
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extern void vmpressure_init(struct vmpressure *vmpr);
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extern void vmpressure_cleanup(struct vmpressure *vmpr);
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extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
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extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
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extern int vmpressure_register_event(struct mem_cgroup *memcg,
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struct eventfd_ctx *eventfd,
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const char *args);
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extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
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struct eventfd_ctx *eventfd);
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#else
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static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
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unsigned long scanned, unsigned long reclaimed) {}
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static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
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int prio) {}
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#endif /* CONFIG_MEMCG */
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#endif /* __LINUX_VMPRESSURE_H */
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